Koob zoo li Mullite Crystals uas Confer High Melting Point, Tsawg Reversible Thermal Expansion Thiab Zoo heev Resistance rau Thermal Shock Rau Fused Mullite
- Corundum ntau yam
- High-purity fused mullite
- Electro-fused mullite
Qhia luv luv
Fused Mullite 75
| Cov khoom | Chav tsev | Index | Hom | |
| Tshuaj muaj pes tsawg leeg | Al2O3 | % | 73.00-77.00 Nws | 73.90 ib |
| SiO2 | % | 22.00-29.00 Nws | 24.06 Nws | |
| Fe2O3 | % | 0.4 max (Fines 0.5% max) | 0.19 ib | |
| K2O + Na2O | % | 0.40 max | 0.16 | |
| CaO + MgO | % | 0.1% max | 0.05 Nws | |
| Refractoriness | ℃ | 1850 min | ||
| Qhov ntom ntom | g/cm3 | 2.90 min | 3.1 | |
| Cov ntsiab lus iav theem | % | 10 max | ||
| 3 Al2O3.2 TSI2Theem | % | 90 min | ||
F-Fused;M-Mullite
Fused Mullite 70
| Cov khoom | Chav tsev | Index | Hom | |
| Tshuaj muaj pes tsawg leeg | Al2O3 | % | 69.00-73.00 Nws | 70.33 ib |
| SiO2 | % | 26.00-32.00 Nws | 27.45 Nws | |
| Fe2O3 | % | 0.6 max (Fines 0.7% max) | 0.23 | |
| K2O + Na2O | % | 0.50 max | 0.28 ib | |
| CaO + MgO | % | 0.2% max | 0.09 ib | |
| Refractoriness | ℃ | 1850 min | ||
| Qhov ntom ntom | g/cm3 | 2.90 min | 3.08 Nws | |
| Cov ntsiab lus iav theem | % | 15 max | ||
| 3 Al2O3.2 TSI2Theem | % | 85 nqi | ||
Txheej Txheem Ntau Lawm
Fused Mullite yog tsim los ntawm Bayer txheej txheem alumina thiab siab purity quartz xuab zeb thaum fusing nyob rau hauv super-loj hluav taws xob arc rauv.
Nws muaj cov ntsiab lus siab ntawm rab koob zoo li mullite crystals uas muaj siab melting point, tsis tshua muaj reversible thermal expansion thiab zoo heev tiv thaiv thermal shock, deformation nyob rau hauv load, thiab tshuaj corrosion ntawm kub.
Daim ntawv thov
Nws yog dav siv los ua cov ntaub ntawv raw rau qib siab refractories, xws li hauv ob sab phlu cib hauv iav kiln rauv thiab cib siv hauv cov cua kub cua sov hauv kev lag luam steel.
Nws kuj tseem siv hauv Ceramic kiln thiab petrochemical kev lag luam thiab ntau lwm yam kev siv.
Fused Mullite nplua yog siv nyob rau hauv Foundry txheej rau nws thermal shock tsis kam thiab tsis-wettability zog
Nta
• Siab thermal stability
• Tsawg reversible thermal expansion
• Tiv thaiv slag nres ntawm qhov kub thiab txias
• Cov tshuaj lom neeg ruaj khov
Mullite, ib yam ntawm cov ntxhia tsis tshua muaj xws li txhuas silicate (3Al2O3·2SiO2).Nws yog tsim los ntawm firing aluminosilicate raw cov ntaub ntawv thiab yog qhov tseem ceeb tshaj plaws ntawm ceramic whiteware, porcelains, thiab high-temperature insulating thiab refractory cov ntaub ntawv.Cov khoom xyaw, xws li mullite, muaj qhov sib piv ntawm alumina-silica tsawg kawg yog 3: 2 yuav tsis yaj hauv qab 1,810 ° C (3,290 ° F), hos cov uas muaj qhov sib piv qis ib nrab yaj ntawm qhov kub thiab txias li 1,545 ° C (2,813 ° C). F).
Ntuj mullite tau tshawb pom li dawb, elongated crystals ntawm Island of Mull, Inner Hebrides, Scot.Nws tau raug lees paub tsuas yog nyob rau hauv fused argillaceous (clayey) enclosures nyob rau hauv intrusive igneous pob zeb, ib qho xwm txheej uas qhia tias kub heev ntawm kev tsim.
Dhau li ntawm nws qhov tseem ceeb rau cov pa ceramics, mullite tau dhau los ua ib qho kev xaiv ntawm cov khoom siv rau cov qauv tsim thiab kev ua haujlwm zoo ceramics vim nws cov khoom zoo.Qee cov khoom zoo ntawm mullite yog cov thermal expansion, tsis tshua muaj thermal conductivity, zoo heev creep kuj, high-temperature zog, thiab zoo tshuaj stability.Cov txheej txheem ntawm kev tsim mullite nyob ntawm txoj kev sib txuas cov alumina- thiab silica-muaj reactants.Nws kuj tseem cuam tshuam txog qhov kub thiab txias uas cov tshuaj tiv thaiv ua rau kev tsim ntawm mullite (mullitisation kub).Mullitisation kub tau raug tshaj tawm tias txawv ntawm ntau pua degrees Celsius nyob ntawm seb txoj kev siv hluavtaws siv.
